Core-machine



H. B. SWAN.

CORE MACHINE.

APPLICATION FILED SEPT. I4. 19m.

l ,3 1 1 ,425. Patented July 29, 1919.

nue "tot atroz una THE COLUMBIA PLANOGRAPII co.. WASHINGTON, n. c.

H. B. SWAN.

CORE MACHINE.

APPLICATION FILED SEPT. I4. 1919.

1,3 1 1,425. Patented July 29, 1919.

2 SHEETSw-SHEET 2.

TIII: coLuMnIA PLANoulzAPII co.. WASHINGTUN, D. C.

HARRY 1B. SWAN, 0F DETROIT, MICHIGAN. Y

C('TREMACHINE "die:

Specification of Letters Patent.

PatenteaJuly 29, 1919.

Application filed September 14, 1918. Serial No. 254,056.

T0 all whom t may concern:

Be it known that I, HARRY B.`SWAN, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Core- Machines, of which the following is a specification, reference being had therein to the accompanying drawings.V

In the operation of core machines of the type wherein the core box is inverted and the core plate with core withdrawn, exertion is necessary on the part of the operator to shift the machine from the molding t-o the drawing position.

lThis invention relates to a core machine wherein themoving parts with the core box and core plate are kept in balance during inversion so that there is no special effort needed on the part of the operator to turn the box over, and whereby the'work may be done by persons having slight physical strength, thereby making the machine particularly adaptable for use where female labor is employed. n

. A further` feature is the method of withdrawal or fdraw of thel core plate from the box, wherein the weight of the core and plate assist while the plate supports maintain alinement of the parts without the need of any particular skill, strength, or experience on the part of the operator.

The invention consists in the matters hereinafter vset forth, and more particularly pointed out in the appended claims.

In the drawings,

Figure 1 is a view of a core machine embo'd'ying features of the invention;

Fig. 2 is a front elevation of the machine in ramming position, with the core lbox and a late clamped home ready for inversion;

4Vig. 3 is a view showing the machine inverted and the core plate withdrawn from the box.Y

As herein indicated, a base 1 is carried by a pair of trunnions 2 and 3 in bearings 4 which are mounted on any suitable support, dust washers of felt being introduced at the ends of the bearing boxes, if it is preferred.

Adjustability yof theA base 1 so that the center of gravity of the base and load, consisting of a core vbox 7- and plate 8, may be brought into coincidence with the axis of the trunnions, is attained b means of a twwpart construction of t. e trun nions 2 and 3, whereby brackets 9 vare adjustablysecured on arms 10 Vtransverse to. the shafts 11 and 12 of thel trunni'ons. For further manipulation the shaft 12 is elongatedand is provided with a wheel 13 with a spring projected latch li'engag-` ing the face of the companion bearing box so as to lock the base in horizontaler in in-v verted position. The brackets .v9 are also adjustable longitudinally. on the base to which they are secured by cap `screws 5 or like fasteninoV means. A

A pair of draw bars 15 are longitudinally reciprocable in bearings 16 formed on one margin of thev base 1, andare connected by an adjustable cross bar `or yoke 17uk whereby they maybe moved simultaneously` through the mediumof a pair of oppositely disposed links 18 pivoted on a common pin 119 to the middle porti-on o f the yoke, and .at the other end to Vcrank arms'20 and 21jbystuds .22- adapted to engage in anyofr a plurality of apertures 23 formedV in` the arms. This t`ogether withA adjustable connection between the yoke and draw bars,lpermits the machine to accommodate coreboxes and drags of different sizes andlengths of draw.

A pair of parallel shafts. 25 and 26 on which the crank arms 20 yand 21 are secured are journaled transversely across the base in suitable bearing They are connected to turn together by means of gears 36 suitably housed in a casing 27 formed on the base. A crank 29 at the ends of the shaft 25 on op posite sides of the base affords means for rotating the shafts. Y

As a detail of good construction, Van annular Acap is inserted in each endrof yeach bearing 16,-to retain dry graphite or like lubricant therein andl thus prevent the bear-l ings from cutting under-the inuence of dirt which would otherwise be drawn into them.

A pair of clamping arms 31 are each swiveled on the reduced upper end portions of the draw bars 15, each byy a suitable vwasher' 33 and screw 34: or thelike. These arms are adapted to swing over the base, and a core box secured thereon by suitable means such s bolts .engaging slots or apertures in the In operation, theinachine is adjusted' as shown in Fig. 1, so .that the center of gravity of the core box and dra or draw late thereof constituting the cad, and o the base and. clamping parts is coincident with the axis'foffthe"trunnins The *core box is" rammed, the plate placed thereon and the clamping arms drawn 'down by i'inanijpu-lai-i` tion of the cam shafts and cranks so that the `right line position assumed by the pivots of the connecting links and crank arms pre-'- between s'halts and .the Vangular disposition ofthe crank arms land links'rela'tive to each other/'a parallel motion is insuredsothat theeoretalls 'away from the lboxwithjout special attention on the part' of the operator and without injuryor disruptiontotlre core. The platewith core is easily slid oli the clamping arms.

lThe machine :is then readily reverted to originali positio-1i,the core box again''llejd and fa "nowel', core"pi"in`t y plate l'or draw As a Yresult Eof this constructionthe machine'fis lreadily adjustable lor' diierent dimensions l'ott core "boxes, and r'egardle ss olf the weight placed upon themachine, is easily. y'tilted without special effort', into" drawing' position.` "Thisen'ables the machine to be used'by female-operators" who'can turn out a great deal'bf v-work wi-thoi'it particular fatigue as there is' no lifting of the parts and no speci-a1 rvalfort required.

Erom'the foregoingit will b'enote'dthat thema'cliine'may be used in'fconne'cti'on lwith a nowe'l, drager other well known elements in the `artofmold'i-iig and consequently can be used `for''anylind"etanol-ding, aswell as core making. i f i v Obviously, changes in theidetails :of constructionfmay be inade without 'departing from the spirit'of'my .invention and `I do not care to ylimit myself lto any` "particiila'r form-o'rlarrangement'oi.= parts. i

y'llVliat'I'claim i-s:- i' c A'ffcore' molding mach-ine comprising means for suppert-ing and inverting a core box vandjcore pla-te thereon, f adjustable -to bring'the center olfgravity of support and load into substantial *coincidence with the axis of the motion of the support. y l

f2. A core-molding machine "comprising means for supporting andin'verting a core box and, core plate thereon, adjustable to the 4"center of gravity yof thesupport load into 'substantial' coincidencejwi-th the axisjl'of motion. of` thegsupport, land lfirieanusf A on the L support reciprocable to and 'roin'i't adaptedto hold'the I-core v'pl-'atel lon theFb'oXi-dii-ring inversion, land to lower the plate vand core from the box when the latter .is inverted Y 3. A core molding machine comprising Pfme'a'ns vl'or supporting and inverting a core' box and core plate thereon, adjustable to bring :the center or gravity of the support and load into substantial (Jo-incidence with the laxisV 'ol motion 'of the support, and means on the support reciprocable to and from vthe flatterl ,-andf in parallell relation theretoadapted to hold the core plate on the box duringinversin and to lower the Vplate from they box when fthe latter "is Vinverted while maintaining it in parallel relation -to the latter. f f Y f f4. core molding machine comprising means foi" supporting acore 4' box, Vi'neans for pi-votally holding thesupp'oit,'adjustable to bringthe Acenter el v'gravity offtli'e'support and its load into- .substantial coincidence with` thel pivot axis, aV -core plate, and means on the sup'j'oortreciprocable to 4and froni'the latter and in parallel relation Vthereto vadapted-to holdthe core plate on the box during inversion and to lower "the plate from fthe box when Vthe flatter-l lisf` inverted.

' 5. Acoremolding machine comprising a base provided witli-tiunnions adjustable to bringl the base and any load thereon into substantial yc nncidence with the jaxis Vlo `the .trunnions, journals :for "the trunnions, a 'core plate, and ineanfs' carried by fthe 'support reciprocable to and from 'thelfatter 'adapted to hold the core plateon the box during inversionand tojlower the core plate VYroinfthe f6. A corev molding machine comprising 'a base forsupporting a'core box, trunni'ons on 'which'the base is tifltable, bearings for the ltrunnions, draw `plate securing means reciprocably'mounted on the .base adapted toc-lamp a' draw plate on 'a' core 'box mount.- ed on the base rduring inversion ol'theflatter and to lower vsaid plateaway "from the box when the base is inverted,and'nreansl'onithe base for reciprocating the draw plate securingmeans f base, trui'inion's for' supporting the base Von which the latterfis adjustable to bring the center otgiavity ofthebase .and the load thereon in coincidence vsubstantially with the axis of the trunnions, means mounted on the basereeiprocable toyfand from the latter, for holding a dif'a'w plate on'a core box finounted on the baseduring inversion "of the base and'for lowe'ring'the plate'away from 'the base after inversion, and mannally oper- Iable 'means connecting the base Yand draw plate holding vmeans for reciprocating the latter' and maintaining 'it 'in parallel rela- Acore moldingfinachiire comprising a tion t'otlie v.base

`SQA core molding machinecomprising" a base plate, trunnions :mounted on' each end 'iso of the base, bearings for the trunnions, draw bars longitudinally reoiprocable in bearings on the base at right angles to the plate, clamping bars journaled on the draw bars over the plate and base, a pair of parallel crank shafts journaled on the base, gears connecting the shafts to turn together, cranks each secured on a shaft, and apair of linkshaving a common pivotal connection withfthe draw bars, each pivoted at the other end to one of the shaft crank arms, and means for locking the base in linitial and inverted positions.

9. A core molding machine comprising a pivotally4 supported base for carrying a core box and draw plate adjustable to bring the center ofr gravity of the base and load thereon into substantial coincidence with the pivot axis, means reciprocable on the base in parallel relation thereto, adapted to clamp the draw plate on the core 'box secured to lthe" base during inversion of the base and to lower the draw plate away from the box after inversion, and means on the base for reciprocating the clamping means adapted to lock the clamping means in initial holding position during and after inversion.r`

10. A core molding machine comprising a base, a pair of oppositely disposed, alined brackets longitudinally adjustable on the base, a pair of trunnions having radial arms on which the brackets are adjustably se- Gopies of this patent may be obtained for ve cents each, by addressing the cured, means for locating one of the trunnions, bearings for the trunnions, a latch secured to one of the trunnions and adapted to engage the adjacent bearings for securing the base in initial and in inverted positions, a pair of guide bearings mounted transversely on the `base in parallel relation, a pair of draw bars longitudinally reciprocable in the guidebearings at right angles to the base, a yoke adjustably secured at either end to the draw bars, a pair of arms each journaled on the end portions of a draw bar to swing over the base in substantially parallel relation thereto, a pair of parallel shafts journaled on the base transversely to the draw bars, gears connecting the shafts to turn in unison, a pair of oppositely disposed links having a common conneetion with the yoke between the draw bars, a crank arm on each shaft adjustably pivotecl to the free end of a companion link, the parts being adjustable to hold the pivot connections of the crank shaft arms, links and yoke in line when the parts are in clamping position, and means for manually rotating either shaft.

In testimony whereof I afHX my signature in the presence of two witnesses.

HARRY B. SWAN.

Witnesses:

ANNA M. Dorm, KARL H. BUTLER.

Commissioner of Patents,

Washington, D. 0. 

